Deriving lower bounds on the efficiency of near-degenerate thermal machines via synchronization

• Main Authors: Murtadho, Taufiq, Thingna, Juzar, Vinjanampathy, Sai
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2023
• Subjects: Science::Physics; Low Bound; Thermal Machines
• Online Access: https://hdl.handle.net/10356/171752
• Institution: Nanyang Technological University

We study the relationship between quantum synchronization and the thermodynamic performance of a four-level near-degenerate extension of the Scovil-Schulz Dubois thermal maser. We show how the existence of interacting coherences can potentially modify the relationship between synchronization and the coherent power output of such a maser. In particular, the cooperation and competition between interacting coherences, causes the coherent heat and efficiency to be bounded by the synchronization measure in addition to the well-studied power synchronization bound. Overall, our results highlight the role of quantum synchronization in the working of a thermal machine.